Japanese Degree Words: yasui, nikui, sugiru, yori

English spreads degree across a pile of separate little words. Easy, hard, too, more, than, as much as, the most. They sit next to the word they modify and never change.

Japanese does it differently. Most degree meanings are glued onto the word itself as a suffix, and comparison — which English does by changing the adjective (big, bigger, biggest) — Japanese does with particles, leaving the adjective untouched.

Everything below is one of four jobs:

They belong together because they answer the same underlying question — how much — and because learners mix them up in the same ways.

やすい and にくい: easy to and hard to do

Both attach to the same place: the stem of a verb — for ます-form verbs, drop the ます.

The result is a new い-adjective, which is the part worth pausing on. 書きやすい is not a verb with decoration on it; it behaves exactly like 高い (takai, "expensive"), taking くない for the negative and かった for the past:

• このペンは書きやすい (kono pen wa kakiyasui, "this pen is easy to write with")
• この字は読みにくかった (kono ji wa yominikukatta, "this handwriting was hard to read")
• この店は入りやすくない (kono mise wa hairiyasukunai, "this shop is not easy to walk into")

So you conjugate the tail, never the verb. 書きやすかった is right; 書いたやすい is not a word.

Two meanings, not one

やすい covers two different ideas:

• Easy to do — about the person doing it: 使いやすいアプリ (tsukaiyasui apuri, "an app that is easy to use")
• Tends to happen — about the thing itself: 壊れやすい (kowareyasui, "breaks easily"), 忘れやすい (wasureyasui, "easily forgotten")

The second reading is where やすい stops being about convenience and becomes a prediction. このガラスは割れやすい (kono garasu wa wareyasui, "this glass breaks easily") is not saying the glass is convenient. It is saying it is fragile.

にくい only carries the first reading: 割れにくい (warenikui, "hard to break") is about durability. It does not mean "rarely happens" the way やすい means "often happens".

にくい vs づらい

There is a third form worth knowing: づらい (zurai), and it overlaps with にくい. The difference is what kind of difficulty you mean.

If the problem is in the object, use にくい. If the problem is in you — embarrassment, awkwardness, not wanting to impose — づらい is the better fit. Both are correct in many sentences; づらい just carries the feeling of discomfort. It also conjugates as an い-adjective, the same way.

すぎる: too much, and slightly too much is a complaint

すぎる attaches in three places, depending on what it follows.

Note the い-adjective row: 高い becomes 高すぎる, not 高いすぎる. The い is dropped, exactly as it is before くない and かった. This is the same rule you already know from adjectives, and it catches people out because 高すぎる looks like it is missing something.

すぎる itself is an ordinary verb — a る-verb — so everything about it conjugates normally:

• 食べすぎた (tabesugita, "I ate too much")
• 高すぎます (takasugimasu, "it is too expensive")
• 静かすぎて眠れない (shizukasugite nemurenai, "it is so quiet I cannot sleep")

すぎる usually means there is a problem

English too and Japanese すぎる line up closely, including in how negative they are. 高い (takai) means "expensive" and might be neutral; 高すぎる (takasugiru) means it is a problem. That is why すぎる turns up so often in apologies:

• 飲みすぎました (nomisugimashita, "I drank too much")
• 言いすぎた (iisugita, "I said too much")
• 食べすぎてお腹が痛い (tabesugite onaka ga itai, "I ate too much and my stomach hurts")

The stem alone, without る, becomes a noun: 飲みすぎ (nomisugi, "overdrinking"), 使いすぎ (tsukaisugi, "overspending"). You will see these as headings and in casual speech.

Comparison: より, のほうが, 一番

Here is the fact that saves English speakers the most work: Japanese adjectives do not change for comparison. There is no -er, no -est, no more, no most. 高い is 高い whether you are comparing or not. Comparison is entirely carried by particles around the adjective.

A is more than B: A は B より

A は B より + adjective.

• 中国は日本より広い (chuugoku wa nihon yori hiroi, "China is bigger than Japan")
• 電車はバスより速い (densha wa basu yori hayai, "the train is faster than the bus")
• 私は彼より背が高い (watashi wa kare yori se ga takai, "I am taller than him")

より (yori) marks the losing side — the standard you are measuring against. It is exactly the job than does in English, and it sits after the noun, not before it. English says "than Japan"; Japanese says 日本より, "Japan-than".

B のほうが: marking the winner instead

The mirror image puts the emphasis on the winner: B のほうが A より + adjective.

• 日本より中国のほうが広い (nihon yori chuugoku no hou ga hiroi, "China is bigger than Japan")

のほうが (no hou ga) means roughly "the side of ___ is more". Both sentences mean the same thing; the second foregrounds China. Asked どちらが速いですか (dochira ga hayai desu ka, "which is faster?"), the answer is 電車のほうが速いです (densha no hou ga hayai desu, "the train is faster").

A is not as ___ as B: ほど…ない

To compare downwards, Japanese needs a negative:

A は B ほど + adjective + negative.

• 今日は昨日ほど寒くない (kyou wa kinou hodo samukunai, "today is not as cold as yesterday")
• 彼は彼女ほど上手じゃない (kare wa kanojo hodo jouzu ja nai, "he is not as good as her")

ほど (hodo) is not optional here and neither is the negative. Together they mean "does not reach the level of". This is the single most common comparison mistake in Japanese, and ほど gets its own section below because it does other work too.

The most: 一番 with a range

Range で + 一番 + adjective.

• 富士山は日本で一番高い山です (fujisan wa nihon de ichiban takai yama desu, "Mount Fuji is the highest mountain in Japan")
• これは一番おいしいです (kore wa ichiban oishii desu, "this is the most delicious")

一番 (ichiban) literally means "number one". The range takes で (de), not は — 日本で一番, "the most in Japan". Without a range, 一番 stands alone and is understood against whatever the conversation is about.

一番 also attaches directly to nouns and verbs in casual speech: 一番好きな食べ物 (ichiban suki na tabemono, "my favourite food"), 一番行きたい場所 (ichiban ikitai basho, "the place I most want to go").

The same as: と同じ

• 私のカバンはあなたのと同じです (watashi no kaban wa anata no to onaji desu, "my bag is the same as yours")
• 彼は私と同じくらい背が高い (kare wa watashi to onaji kurai se ga takai, "he is about as tall as me")

と同じ (to onaji) means "identical to". Adding くらい (kurai) softens it to "about the same" — and that is the bridge to the next section.

Extent: くらい, ほど, だけ

These three answer "how much" without comparing two things at all.

くらい / ぐらい: approximately, and to the extent of

くらい and ぐらい are the same word with a sound variation. Neither is more correct; ぐらい is more common in speech.

• 10分くらいかかります (juppun kurai kakarimasu, "it takes about ten minutes")
• 5人ぐらい来ました (gonin gurai kimashita, "about five people came")
• これくらいでいいです (kore kurai de ii desu, "this much is fine")

It has a second job: naming the extent something reaches.

• 痛いくらい歩いた (itai kurai aruita, "I walked until it hurt")
• 涙が出るくらい嬉しかった (namida ga deru kurai ureshikatta, "I was happy enough to cry")

And a third, casual one — "at least, come on":

• 少しくらい待ってよ (sukoshi kurai matte yo, "wait a little, at least")

ほど: to such a degree that

ほど does the extent job too, but it is heavier. Where くらい says "about this much", ほど says "to a striking degree".

• 涙が出るほど嬉しかった (namida ga deru hodo ureshikatta, "I was happy to the point of tears")
• 死ぬほど疲れた (shinu hodo tsukareta, "I am tired to death")
• 歩けないほど痛い (arukenai hodo itai, "it hurts so much I cannot walk")

You will notice 涙が出るくらい and 涙が出るほど are both fine, with ほど sounding stronger. Here is the practical split:

There is one place where they are not interchangeable: the negative comparison. Only ほど…ない means "not as ___ as". くらい does not do that job.

だけ: only, and as much as possible

だけ (dake) belongs to the same question — how much. Its core meaning is "only, just": 見るだけです (miru dake desu, "I am just looking"), 水だけ飲みました (mizu dake nomimashita, "I drank only water").

Its second use is "as much as": できるだけ早く (dekiru dake hayaku, "as fast as possible"), 好きなだけ食べてください (suki na dake tabete kudasai, "eat as much as you like"). できるだけ is a fixed phrase you will hear constantly. だけ has more to it — the combination with しか and negatives is covered in dake and shika.

Common mistakes for English speakers

• Attaching やすい to the dictionary form. 食べるやすい is wrong. It is 食べやすい (tabeyasui, "easy to eat") — the stem, not the dictionary form. Same for にくい and すぎる. English speakers reach for the form they know best, and it is the one that never works here.
• Looking for -er and -est. There are none. 高い stays 高い in every comparison; the particles より and のほうが do the work. If you want to add something to the adjective, you are rebuilding English.
• Putting より in the wrong place. より follows the standard you measure against, not the thing being described. 中国は日本より広い — 日本より, "than Japan". 私は日本より中国は広い is a scrambled sentence, not a poetic one.
• Dropping the negative from ほど…ない. 昨日ほど寒い means nothing sensible. ほど only produces "not as ___ as" together with a negative: 昨日ほど寒くない.
• Writing 高いすぎる. The い is dropped: 高すぎる (takasugiru, "too expensive"). Same rule as 高くない and 高かった.
• Using くらい for the negative comparison. 今日は昨日くらい寒くない is not the standard way to say "not as cold as yesterday". Use ほど.
• Conjugating the wrong half of 書きやすい. It is 書きやすかった, not 書いたやすい. The compound is an い-adjective, so the tense goes on the tail.
• Assuming すぎる is neutral. 大きい (ookii, "big") can be a compliment; 大きすぎる (ookisugiru, "too big") is a problem. Use とても (totemo, "very") for "very" and すぎる for "too".

Where this pays off

These four jobs — ease, excess, comparison, extent — cover an enormous share of everyday Japanese. Reviews are written in やすい and にくい, apologies in すぎる, and any opinion about anything in より and 一番. Once the suffixes are automatic, you stop constructing sentences about preferences and start saying them.

The やすい / にくい / すぎる group sits on the verb stem, so verb classification is the right background if stems are still unclear, and the comparison set leans on adjectives.

Romaji.live puts these forms in real sentences rather than isolated cards, which matters here more than usual: 食べやすい and 食べすぎた are easy to confuse on a list and impossible to confuse in a sentence. Warm up on the interactive kana table if you are still slow on the characters, take a practice session and type the comparison and degree patterns as they come up, and use the romaji converter whenever a compound's reading is not what you expected.